package com.sky.controller.user;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@Api(tags = "菜品")
@RequestMapping("/user/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;
    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List> list(Long categoryId){
        log.info("根据分类id查询菜品:{}",categoryId);
        //生成redis中的key
        String key = "dish_" + categoryId;

        //判断缓存中是否存在分类查询所需的数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if(list != null && list.size() > 0){
            //说明缓存中存在数据,直接返回
            return Result.success(list);
        }
        //缓存中没有数据,查询数据库
        list = dishService.list(categoryId);
        //并将数据存储进缓存
        redisTemplate.opsForValue().set(key,list);

        return Result.success(list);
    }
}
















